/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.tsfile.v2.file.metadata;

import org.apache.iotdb.tsfile.file.metadata.ChunkMetadata;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.file.metadata.statistics.Statistics;
import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils;
import org.apache.iotdb.tsfile.v2.file.metadata.statistics.StatisticsV2;

import java.io.Serializable;
import java.nio.ByteBuffer;

public class ChunkMetadataV2 {

    private ChunkMetadataV2() {
    }

    /**
     * deserialize from ByteBuffer.
     *
     * @param buffer ByteBuffer
     * @return ChunkMetaData object
     */
    public static ChunkMetadata deserializeFrom(ByteBuffer buffer) {

        String measurementUid = ReadWriteIOUtils.readString(buffer);
        long offsetOfChunkHeader = ReadWriteIOUtils.readLong(buffer);
        TSDataType tsDataType = TSDataType.deserialize((byte) ReadWriteIOUtils.readShort(buffer));

        Statistics<? extends Serializable> statistics = StatisticsV2.deserialize(buffer, tsDataType);
        ChunkMetadata chunkMetaData =
                new ChunkMetadata(measurementUid, tsDataType, offsetOfChunkHeader, statistics);
        chunkMetaData.setFromOldTsFile(true);
        return chunkMetaData;
    }
}
